/Engine/Plugins/Runtime/AudioWidgets/Source/AudioWidgets/Public/AudioMeter.h
void OnMeterOutput ( [UMeterAnalyzer](API\Plugins\AudioSynesthesia\UMeterAnalyzer) * InMeterAnalyzer, int32 ChannelIndex, const [FMeterResults](API\Plugins\AudioSynesthesia\FMeterResults) & InMeterResults )